Try the Altcoin Mining board for this, mining farms here in the Bitcoin boards all use SHA256 ASICs which wont be useful in that use-case.
Look for GPU mining farms specifically.

Link to "Mining (Altcoins)" board: https://bitcointalk.org/index.php?board=160.0

On a side note: I doubt that you can convince any GPU farm owners to help with with this wild goose chase though.